Three-digit numbers

Use the numbers 4,5,8,9 to write all three-digit numbers without repetition. How many such numbers are there?

Correct answer:

n =  24

Step-by-step explanation:

$n=4\cdot 3\cdot 2=24$

Try another example

Related math problems and questions:

• Three-digit numbers
  How many three-digit numbers are from the numbers 0 2 4 6 8 (with/without repetition)?
• Phone numbers
  How many 7-digit telephone numbers can be compiled from the digits 0,1,2,..,8,9 that no digit is repeated?
• Numbers
  How many different 3 digit natural numbers in which no digit is repeated, can be composed from digits 0,1,2?
• Three-digit numbers
  We have digits 0,1,4,7 that cannot be repeated. How many three-digit numbers can we write from them? You can help by listing all the numbers.
• Three digits number
  How many are three-digit integers such that they no digit repeats?
• Three-digit
  How many do three-digit natural numbers not have the number 7?
• Big numbers
  How many natural numbers less than 10 to the sixth can be written in numbers: a) 9.8.7 b) 9.8.0
• Inverted nine
  In the hotel Inverted Nine, each hotel room number is divisible by 6. How many rooms can we count with the three-digit number registered by digits 1,8,7,4,9?
• Digits
  How many natural numbers greater than 4000 which are formed from the numbers 0,1,3,7,9 with the figures not repeated, B) How many will the number of natural numbers less than 4000 and the numbers can be repeated?
• A three-digit numbers
  Determine the total number of positive three-digit numbers that contain a digit 6.
• Three-digit integers
  How many three-digit natural numbers exist that do not contain zero and are divisible by five?
• Digits
  How many five-digit numbers can be written from numbers 0.3,4, 5, 7 that is divided by 10 and if digits can be repeated.
• Number 4
  Kamila wrote all natural numbers from 1 to 400 inclusive. How many times did she write the number 4?
• Permutations
  How many 4-digit numbers can be composed of numbers 1,2,3,4,5,6,7 if: and, the digits must not be repeated in the number b, the number should be divisible by 5 and the numbers must not be repeated c, digits can be repeated
• Lunch
  Seven classmates go every day for lunch. If they always come to the front in a different order, will be enough school year to take of all the possibilities?
• Three-digit
  How many three-digit natural numbers are greater than 321 if no digit in number repeated?
• Permutations with repetitions
  How many times the input of 1.2.2.3.3.3.4 can be permutated into 4 digits, 3 digits and 2 digits without repetition? Ex: 4 digits = 1223, 2213, 3122, 2313, 4321. . etc 3 digits = 122.212.213.432. . etc 2 digits = 12, 21, 31, 23 I have tried permutation fo